Airflow Organization Characteristics of Metro Train Passenger Compartment
Journal Title: Urban Mass Transit - Year 2025, Vol 28, Issue 3
Abstract
［Objective］ The comfort of airflow delivery in metro air-conditioning systems is a critical indicator for the performance measurement. To ensure passenger comfort, it is necessary to maintain the indoor temperature and air velocity within a reasonable range in the passenger compartments. Therefore, an in-depth study of the airflow organiztion inside metro train compartments is essential. ［Method］ Focusing on the passenger compartment of a Tc car (trailer car with driver′s cabin) in a specific metro train, a comprehensive analysis of vehicle parameters and operating environment is conducted, followed by optimization of the air duct structure. On this basis, a geometric model is constructed and meshed. Using computational fluid dynamics (CFD) methods and simulation tools such as HyperMesh and STAR-CCM+, the airflow organization and temperature characteristics in the compartment are simulated under both no-load and full-load conditions. Experimental tests are carried out to validate and compare the simulation results. ［Result & Conclusion］ Under all operating conditions, the main airflow velocity within the compartment remains below 0.5 m/s, avoiding significant draft discomfort for passengers. However, issues of airflow short-circuiting and counterflow are still observed. In un-load condition, the compartment exhibits good uniformity in airflow organization and temperature distribution, while in full-load condition, the temperature distribution uniformity declines. The optimized air duct structure demonstrates excellent airflow delivery performance.
Authors and Affiliations
Haifei YU, Chongyi HAN, Xiaoe TU, Xingjian ZHANG, Jianbin ZANG
Keywords
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- EP ID EP760147
- DOI 10.16037/j.1007-869x.2025.03.027
- Views 22
- Downloads 0
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